An interview is not just about your answers to the questions and getting them right.  It is about how you answer; your tone, your body language and your ability to engage with the interviewers.  The interviewer will be looking for comprehensive answers that include real-life examples.  They will look at your dress, your grooming and your personal hygiene.  They will look for someone with confidence and the ability to speak clearly and listen well, someone who has an understanding of the job and who is motivated and enthusiastic.